High-performance saw chain and high-performance cutting saw based on it

Abstract

High-performance saw chain comprising a cutting link (1) and a drive link (2), wherein the cutting link (1) and the drive link (2) are connected to each other via a rivet (3) and a connecting plate (4), characterized in that the cutting link (1) has a cutting edge (5), wherein the distance between the tip of the cutting edge (5) and the underside of the cutting link (1) is referred to as a, while the chain pitch is defined as half the distance between the centers of three successive rivets and is referred to as b, wherein the efficiency ratio k is defined as k = a / b, where 1.28 ≤ k ≤ 1.5.

Description

Technical field

[0001] The present utility model relates to the technical field of cutting tools, in particular a high-performance saw chain and a high-performance cutting saw based thereon. State of the art

[0002] A chainsaw is an efficient tool for cutting wood, with the core cutting component being a ring-shaped saw chain surrounding a guide plate. Conventional saw chains are typically manufactured by alternately riveting drive links, connecting plates, and cutting links. Cutting performance is primarily influenced by several factors, including the design of the cutting teeth, the chain pitch, and lubrication conditions.

[0003] Currently, the size ratio between the cutting links (commonly known as the "cutting head") and the chain pitch of commercially available saw chains is largely based on empirical design principles, without an established optimization theory. A cutting link that is too tall (i.e., too high a value for a) results in excessively deep cuts, making the saw prone to jamming, generating strong vibrations, and requiring extremely high power. Conversely, a cutting link that is too short (i.e., too small a value for a) results in minimal wood removal per cut, leading to poor efficiency.

[0004] Therefore, determining a scientifically sound proportional relationship between the geometric dimensions of the cutting element and the basic chain parameter (pitch) to maximize cutting performance while ensuring smooth and safe operation is an urgent challenge in this field. Disclosure of the utility model

[0005] The purpose of the present utility model is to solve the aforementioned problems of the prior art by providing a high-performance saw chain.

[0006] The purpose of the present utility model can be achieved by the following technical solution: A high-performance saw chain comprising a cutting link and a drive link, wherein the cutting link and the drive link are connected to each other via a rivet and a connecting plate, characterized in that the cutting link has a cutting edge, wherein the distance between the tip of the cutting edge and the underside of the cutting link is referred to as a, while the chain pitch is defined as half the distance between the centers of three successive rivets and is referred to as b, wherein the efficiency ratio k is defined as k = a / b, where 1.28 ≤ k ≤ 1.5.

[0007] The high-performance saw chain of the present utility model is ring-shaped and is part of a high-performance cutting saw. Its drive links are driven by a drive unit to rotate the entire unit, while the cutting links perform the actual cutting operation via their cutting edges. The ratio of the cutting link height to the chain pitch influences the cutting performance. The present application optimizes the selection of this ratio k, with k preferably being chosen in the range of 1.28 ≤ k ≤ 1.5. This enables optimized cutting performance without significantly increasing the load or vibrations.

[0008] Alternatively, the range of values ​​for k can also be set to 0.1 ≤ k ≤ 1.22.

[0009] Furthermore, the cutting element has two first rivet holes distributed in the longitudinal direction and extending continuously in the thickness direction, with the rivet being inserted through the first rivet hole and with the cutting element being provided on the top side with the cutting edge and a limiting tooth.

[0010] The rivet secures the connection by being guided through the first rivet hole. The cutting edge on the top of the chain link is used for cutting wood, while the limiting tooth regulates the cutting depth.

[0011] Furthermore, the height of the limiting tooth is less than or flush with the height of the cutting edge, thus ensuring its effective limiting function.

[0012] Furthermore, the cutting edge and the limiting tooth are arranged apart from each other to form a tooth border, with the cutting edge facing the tooth border.

[0013] The toothed edging serves to receive chips and to guide them, with the cutting edge of the cutting edge being aligned towards this toothed edging to facilitate the removal and ejection of wood chips.

[0014] Furthermore, the drive member has two second rivet holes distributed in the longitudinal direction and extending continuously in the thickness direction, with the rivet being inserted through the second rivet hole and with the drive member being provided on the underside with a drive tooth that projects downwards.

[0015] The drive tooth is designed to engage with a drive sprocket of the high-performance cutting saw, ensuring smooth and reliable drive performance.

[0016] Furthermore, the drive tooth is arc-shaped and the release side of the drive tooth is provided with a notch.

[0017] The drive tooth has an arc-shaped profile that allows for improved engagement and better force distribution. Furthermore, a notch is provided on the disengagement side of the drive tooth, i.e., the side where it disengages from the gear teeth, to catch and expel any foreign matter that may be trapped during engagement, thus reducing the risk of jamming.

[0018] Furthermore, the front first rivet hole of the cutting element is connected to the subsequent second rivet hole of the drive element by means of a rivet, while adjacent drive elements are connected to each other via the cutting element or the connecting plate.

[0019] Along the entire ring chain, adjacent drive links are connected to each other either by a cutting link or a connecting plate, creating a cyclic pattern of "drive-connection / cut-drive".

[0020] Furthermore, the drive tooth is provided with an oil injection hole extending continuously in the thickness direction, and one or both sides of the drive tooth have a first oil groove, the first oil groove connecting the oil injection hole to the rivet hole. At least one longitudinally extending flow guide rib is formed in the first oil groove, and a second oil groove is further provided between the notch and the oil injection hole.

[0021] When the chain runs within the guide plate groove filled with lubricating oil, the oil can penetrate through the oil injection hole and be transported via the first oil groove to the rivet holes, thus achieving active and precise lubrication of the riveted joints. To optimize the flow and adhesion of the oil within the first oil groove, flow guide ribs are incorporated. These flow guide ribs extend along the length of the first oil groove and facilitate the uniform supply of lubricating oil to the relevant joint points. This prevents problems where, due to factors such as inertia, the lubricating oil is only transported to the joints along one side of the first oil groove, ensuring uniform lubrication in the circumferential direction. For further optimization, a second oil groove can be integrated into the drive tooth.This oil groove connects the oil injection hole to the notch, thus facilitating the circulation of lubricating oil between the injection hole and the notch on the drive tooth. This improves lubrication between the drive tooth and the drive sprocket, the output sprocket, and the guide plate groove of the high-performance cutting saw. Both the first and second oil grooves are recessed groove structures machined into the flanks of the drive tooth, ensuring structural strength while simultaneously allowing lubricating oil flow.

[0022] Another purpose of the present utility model is to solve the aforementioned prior art problems by providing a high-performance cutting saw.

[0023] This purpose of the present utility model can be achieved by the following technical solution: A high-performance cutting saw comprising a main body, wherein the main body is provided with a guide plate, the guide plate having a drive sprocket and a driven sprocket at both ends, the drive sprocket being connected to a drive unit via gears, a ring-shaped high-performance saw chain as described above being arranged between the drive sprocket and the driven sprocket, the guide plate being provided with a guide plate groove in which the drive tooth of the drive link is displaceable, and both the drive sprocket and the driven sprocket being engaged with the high-performance saw chain.

[0024] The guide plate is elongated, with the drive sprocket and the driven sprocket located at both ends. The drive unit on the main body provides the power to the drive sprocket. The teeth of the drive and driven sprockets engage with the drive teeth of the heavy-duty saw chain, thus transmitting the power to achieve the rotational movement of the saw chain.

[0025] The depth and width of the guide plate groove correspond to the height and width of the drive tooth. The pitch of the drive sprocket and the driven sprocket corresponds to the chain pitch of the high-performance saw chain.

[0026] The depth and width of the guide plate groove are slightly larger than the corresponding parameters of the drive tooth, thus ensuring stable guidance. Furthermore, the pitch of both the drive sprocket and the driven sprocket must precisely match the chain pitch (b) of the high-performance saw chain to guarantee smooth engagement.

[0027] Compared to the prior art, the present utility model offers the following advantages in particular: 1. This high-performance saw chain maintains the efficiency ratio k within a preferred range, thus ensuring a balance between single-cut load and feed rate to improve cutting performance. 2. The unique design of the oil injection hole and the first oil groove on the drive tooth enables an active lubrication channel from the guide plate groove to the rivet connection, thereby significantly improving lubrication conditions at the most wear-prone points of the chain. Furthermore, the design of the flow guide rib improves the uniformity of lubrication. List of drawings Fig. Figure 1 is a schematic representation of the structure of the high-performance saw chain provided by the present utility model; Fig. Figure 2 is a schematic representation illustrating the arrangement of the high-performance saw chain provided by the present utility model on the high-performance cutting saw; Fig. Figure 3 is a schematic representation of the structure of the drive element provided by the present utility model.

[0028] The components are: cutting element 1, drive element 2, rivet 3, connecting plate 4, cutting edge 5, first rivet hole 6, limiting tooth 7, tooth edging 8, second rivet hole 9, drive tooth 10, notch 11, guide plate 12, drive sprocket 13, output sprocket 14, guide plate groove 15, high-performance saw chain 16, oil injection hole 17, first oil groove 18, rivet hole and flow guide rib 19. Detailed descriptions

[0029] Detailed embodiments of the present utility model are described below in conjunction with the accompanying drawings, providing further details of the technical solutions of the present utility model. However, the present utility model is not limited to these embodiments.

[0030] Detailed examples are provided in the Fig. Figures 1 to 3 illustrate this high-performance cutting saw. It comprises a main body to which a guide plate 12 is attached. A drive sprocket 13 and a driven sprocket 14 are arranged at both ends of the guide plate 12. The drive sprocket 13 is connected to a drive unit, with an annular high-performance saw chain 16 arranged between the drive sprocket 13 and the driven sprocket 14. The guide plate 12 is provided with a guide plate groove 15 in which a drive tooth 10 of the drive link 2 is slidably located. The depth and width of the guide plate groove 15 correspond to the height and width of the drive tooth 10, respectively. The pitch of the drive sprocket 13 and the driven sprocket 14 corresponds to the chain pitch of the high-performance saw chain 16. Both the drive sprocket 13 and the driven sprocket 14 engage with the high-performance saw chain 16.The high-performance saw chain 16 comprises a cutting link 1 and a drive link 2, wherein the cutting link 1 and the drive link 2 are connected to each other via a rivet 3 and a connecting plate 4, wherein the cutting link 1 has a cutting edge 5, the distance between the tip of the cutting edge 5 and the underside of the cutting link 1 being denoted as a, while the chain pitch is defined as half the distance between the centers of three successive rivets and is denoted as b. The efficiency ratio k = a / b = 1.15.

[0031] The guide plate 12 is elongated, with the drive sprocket 13 and the driven sprocket 14 located at both ends of the guide plate 12. The drive unit on the main body provides the driving force for the drive sprocket 13. The teeth of the drive sprocket 13 and the driven sprocket 14 engage with the drive teeth 10 of the high-performance saw chain 16 and thus transmit the force to achieve the rotational movement of the saw chain. The high-performance saw chain 16 is ring-shaped. Its drive links 2 are driven by a drive unit to rotate the entire unit, while the cutting links 1 perform the actual cutting operation via their cutting edges 5. The ratio of the height of the cutting links 1 to the chain pitch influences the cutting performance. The present application optimizes the selection of this ratio k.In this embodiment, k is preferably set to 1.15, which results in high cutting performance.

[0032] As in Fig. As shown in Figure 1, the cutting element 1 has two first rivet holes 6, which are distributed in the longitudinal direction and extend continuously in the thickness direction, with the rivet 3 being inserted through the first rivet hole 6, and with the cutting element 1 being provided on its upper surface with the cutting edge 5 and a limiting tooth 7. The height of the limiting tooth 7 is less than the height of the cutting edge 5, thus ensuring its effective limiting function. The cutting edge 5 and the limiting tooth 7 are spaced apart from each other to form a tooth surround 8, with the cutting edge 5 facing the tooth surround 8.

[0033] The rivet 3 secures the connection, in particular by being guided through the first rivet hole 6. The cutting edge 5 on the top of the chain link 1 is used for cutting wood, while the limiting tooth 7 regulates the cutting depth. The toothed rim 8 serves to collect chips and guide them, with the cutting edge of the cutting edge 5 oriented towards this toothed rim 8 to facilitate the removal and ejection of wood chips.

[0034] As in the Fig. 1 and Fig. Figure 3 shows that the drive member 2 has two second rivet holes 9, which are distributed in the longitudinal direction and extend continuously in the thickness direction, wherein the rivet 3 is inserted through the second rivet hole 9 and wherein the drive member 2 is provided on its underside with a drive tooth 10 that projects downwards. The drive tooth 10 is arcuate and the release face of the drive tooth 10 is provided with a notch 11.

[0035] The drive tooth 10 is specifically designed to engage with a drive sprocket of the high-performance cutting saw, ensuring smooth and reliable drive performance. The drive tooth 10 features an arc-shaped profile that facilitates improved engagement and better force distribution. Furthermore, a notch 11 is provided on the disengagement side of the drive tooth 10—that is, the side where it disengages from the toothing—to collect and expel any foreign matter that may be trapped during engagement, thereby reducing the risk of jamming.

[0036] In this embodiment, the front first rivet hole 6 of the cutting link 1 is connected to the subsequent second rivet hole 9 of the drive link 2 by means of a rivet 3, while adjacent drive links 2 are connected to each other via the cutting link 1 or the connecting plate 4. Along the entire ring chain, adjacent drive links 2 are connected to each other either by a cutting link 1 or a connecting plate 4, thus creating a cyclic pattern of "drive-connection / cut-drive".

[0037] As an optimization of this embodiment, the drive tooth 10 is provided with an oil injection hole 17 that extends continuously in the thickness direction, and both sides of the drive tooth 10 have a first oil groove 18, wherein the first oil groove 18 connects the oil injection hole 17 with the rivet hole. A flow guide rib 19 extending in the longitudinal direction is formed in the first oil groove 18.

[0038] When the chain runs within the oil-filled guide plate groove 15, the oil can penetrate through the oil injection hole 17 and be transported via the first oil groove 18 to the rivet holes, thus achieving active and precise lubrication of the rivet 3 connections. To optimize the flow and adhesion of the oil within the first oil groove 18, flow guide ribs 19 are formed in the first oil groove 18. These flow guide ribs 19 extend along the length of the first oil groove 18 and facilitate the uniform supply of lubricating oil to the relevant connection points. This avoids problems where, due to factors such as inertia, lubricating oil is only transported to the connections along one side of the first oil groove 18, thus ensuring uniform lubrication in the circumferential direction.

[0039] The detailed operating principle: During operation, the drive unit rotates the drive sprocket 13. The drive sprocket 13, in turn, rotates the high-performance saw chain 16. At the lubrication unit, lubricating oil is fed into the oil injection hole 17. As the saw chain rotates, the lubricating oil is gradually conveyed from the oil injection hole 17 along the first oil groove 18 towards the connection point of the rivet 3, thus enabling lubrication.

Claims

[1] High-performance saw chain comprising a cutting link (1) and a drive link (2), wherein the cutting link (1) and the drive link (2) are connected to each other via a rivet (3) and a connecting plate (4), characterized by , that the cutting member (1) has a cutting edge (5), wherein the distance between the tip of the cutting edge (5) and the underside of the cutting member (1) is called a, while the chain pitch is defined as half the distance between the centers of three successive rivets and is called b, wherein the efficiency ratio k is defined as k = a / b, where 1.28 ≤ k ≤ 1.

5. [2] High-performance saw chain according to claim 1, characterized by, that the cutting member (1) has two first rivet holes (6) which are distributed in the longitudinal direction and extend continuously in the thickness direction, wherein the rivet (3) is inserted through the first rivet hole (6) and wherein the cutting member (1) is provided on the upper side with the cutting edge (5) and a limiting tooth (7). [3] High-performance saw chain according to claim 2, characterized by , that the height of the limiting tooth (7) is less than the height of the cutting edge (5) or is flush with it. [4] High-performance saw chain according to claim 2, characterized by , that the cutting edge (5) and the limiting tooth (7) are arranged apart from each other to form a tooth surround (8), with the cutting edge (5) facing the tooth surround (8). [5] High-performance saw chain according to claim 1, characterized by, that the drive member (2) has two second rivet holes (9) which are distributed in the longitudinal direction and extend continuously in the thickness direction, wherein the rivet (3) is inserted through the second rivet hole (9) and wherein the drive member (2) is provided on the underside with a drive tooth (10) which projects downwards. [6] High-performance saw chain according to claim 5, characterized by , that the drive tooth (10) is arc-shaped and the release side of the drive tooth (10) is provided with a notch (11). [7] High-performance saw chain according to claim 6, characterized by , that the drive tooth (10) is provided with an oil injection hole (17) extending continuously in the thickness direction, and that one or both sides of the drive tooth (10) have a first oil groove (18), wherein the first oil groove (18) connects the oil injection hole (17) to the rivet hole. [8] High-performance saw chain according to claim 7, characterized by, that at least one flow guide rib (19) extending in the longitudinal direction is formed in the first oil groove (18), wherein a second oil groove is further provided between the notch (11) and the oil injection hole (17). [9] High-performance saw chain according to any one of claims 1 to 8, characterized by , that 1.28 ≤ k ≤ 1.5 is replaced by 0.1 ≤ k ≤ 1.

22. [10] High-performance cutting saw comprising a main body, characterized by, that the main body is provided with a guide plate (12), wherein the guide plate (12) has a drive sprocket (13) and a driven sprocket (14) at both ends, wherein the drive sprocket (13) is connected to a drive unit via a gearbox, wherein an annular high-performance saw chain (16) according to one of claims 1 to 9 is arranged between the drive sprocket (13) and the driven sprocket (14), wherein the guide plate (12) is provided with a guide plate groove (15) in which the drive tooth (10) of the drive member (2) is displaceable, wherein both the drive sprocket (13) and the driven sprocket (14) are engaged with the high-performance saw chain (16).

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